Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ff82c8bf130ac5…

MALICIOUS

PDF

125.7 KB Created: 2021-03-25 06:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aea42750ffb46d5a964ce55bdbb6f39 SHA-1: 3713abf415812dbb834f1a476922a4bd06a113ec SHA-256: 07ff82c8bf130ac54880844a74dec60eebb88b9ec1fed30925cac5d859d7236e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' specifically flags the presence of many external links, suggesting the document's primary purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=gifted+hand+pdf+download
    • http://gavowobow.iblogger.org/11595787550.pdf
    • http://rupebakonodeja.iblogger.org/boishakhi_video_song.pdf
    • http://zifeladawu.scienceontheweb.net/aiha_adalah.pdf
    • http://neditaxuvim.getenjoyment.net/81836429049.pdf
    • https://jawoxufogor.weebly.com/uploads/1/3/6/0/136022219/numopoxi.pdf
    • https://ruwiderok.weebly.com/uploads/1/3/4/8/134891429/pokeje_lodadewuvopiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pikotesewelum.epizy.com/lord_of_the_flies_original_book_cover.pdf
    • https://uploads.strikinglycdn.com/files/35e0843f-a5d5-4d79-8e79-f71c089bea32/61681903265.pdf
    • https://uploads.strikinglycdn.com/files/858b2754-b076-48af-be2f-232678e688e6/vurikikixikutabukazek.pdf
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_ca86ffdfd811476e81766e113431da11.pdf?index=true
    • http://kafodesojokefe.epizy.com/rovazifavabalasemubivoji.pdf
    • https://uploads.strikinglycdn.com/files/4f48e73a-2682-480a-b988-c753e9e912ac/how_to_put_certified_mail_sticker_on_envelope.pdf
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_1a146dd8e9f041eb963e8ae55be5d3e6.pdf?index=true
    • http://mutidulofof.epizy.com/android_bixby_reviews.pdf
    • https://uploads.strikinglycdn.com/files/2cd484a6-71db-4c61-872d-7fb90a187487/the_innovators_dilemma_by_clayton_christensen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a4a5.bin
822989beccf7012d65d3d853ff4b03d9f9ffccf333cc57ebf109215ae4f6ed39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4A5 4764 bytes
font_01_sfnt_off0001b4e0.bin
52d429fc4325e02a87e3afa2607b268613815c0738058f91d417ac0716e4ccee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4E0 11372 bytes
font_02_sfnt_off0001db7a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB7A 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.